<ol>
  <li>Enter the angle and length of the line in the options tool bar.</li>
  <li>In the options tool bar, choose the reference point on the line which you
  want to use for positioning the line. 'Start' means that the line will have
  its start point at the point where you position it.</li>
  <li>Place the line with the mouse or by entering a coordinate in the command
  line.</li>
</ol>
